86 



Studies in Kansas Insects. 



Measurements ix Millimeters. 



Body. Tegmina. Post, femora. 



Female 39.0-29.0 35.5-27.0 20.5-16.5 



Male 31.5-25.0 29.0-23.5 17.0-13.5 



Fig. 84. — Arphia simplex Sc. 



Arphia arcta Sc. 

 Bull. U. S. G. Survey Terr., 2, 263; 1876. 



Head grayish brown above, yellowish elsewhere; the median carina 

 of vertex broken at the posterior limit of the fastigium by the feebly 

 impressed arcuate transverse furrow which marks the same, extending 

 through the frontal costa nearly to the ocellus, expanding and forming 

 a loop at the extremity; lateral foveolse strongly and deeply impressed, 

 narrowing anteriorly. Pronotum grayish brown, the upper surface un- 

 usually flat for an Arphia, rugulose, the median carina but little ele- 

 vated, not laterally pinched at middle, regularly but slightly diminishing 

 in height posteriorly. Tegmina profusely sprinkled with small grayish- 

 fuscous spots, less abundant apically where the area is pellucid. Wings 

 yellowish at the base, pellucid to an unusual extent at tip (nearly one- 

 third of the ante-anal field is included in the pellucid area), making 

 the transverse dusky bar narrower than in any species of Arphia 

 known to me; the radial shoot toward the base, however, is unusually 

 broad and long, equaling at its origin the entire breadth of that part 

 of the wing and scarcely stopping short of the base. Hind femora 

 brownish yellow externally, with two broad, a little oblique, dusky trans- 

 verse bands; hind tibiae pale yellow, with a broad fuscous cloud at tip 

 and just before the middle. 



Length: Male 21 mm., tegmina 22.5 mm., antennas 8.5 mm., hind 

 femur 11.5 mm. 



Described from one male taken at Denver, Colo. 



